| Short Description | Category | |
| Ends with 'ab' | English to DFA | Solve |
| Contains 'aaa' | English to DFA | Solve |
| Number of 'b' divisible by 3 | English to DFA | Solve |
| Ends with ab (Regex) | English to Regular Expression | Solve |
| Contains aaa (NFA) | English to NFA | Solve |
| contains 'ab' at least once | English to DFA | Solve |
